Improvement in the consteuction of oaeteidge- shells



@Intim tartes stent fitte.

l JAMES F. CRANSTOVN, OFSPRINGFIEL-D, MASSACHUSETTS, ASSIGNOR T0 THE AMERICAN TRADING CCMPANYA f Leam- Parem: ivo. 81,478, ma August 25,1868.

IMPROVEMENT IN THE CONSTRUCTION' 0F CARTRIDGE-SHELLS.

i' llgr Schnalle feierten tu in flotte Etnias @tout nn mating mit nf tlge entre.

To ALL WHOM IT MAY CONCERN:A

Be it known that I, JAMES F. CRANSTON, of Springfield, Hampden county, Commonwealth of Massachusetts, have invented certain new and useful Improvements in Centre-Fire Cartridges; and do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

In the drawings- Figure 1 is a sectional view of my invention,

Figures 2 and3 being diagram views of the same.

'Ihis invention consists in the peculiar manner ot fastening anvils in centre-hre cartridges.

In tig. 1 is shown the anvil A, resting against the rear end of the shell. This disk perforated in the centre, for the fire to communicate with the powder, the fulminate being placed in the end of theveartridge enclosed inthe cavity a, formed by upsetting the metal, in the manner shown, so asto form a groove in the centre. In lig. 3 is shown the anvil, formed in the shape of a bar, extending across the rear end ofthe cartridge-shell. In this case, the fastening these pieces in the shell-may bie varied, although I prefer the following process and arrangement: v r

A thin shell of metal, `misplaced inside 0 the cartridge-shell b, fitting it tightly inside. This shell. extends as far inside the shell b as the front edge of the porcelain disk or bar. The shell b has a groove run around the outside at this point, crimping in the edge of the inside shell c, which forms there a. projection, for holding in the porcelain.

In FiguresZ and 4 is shown my method of fastening in the shell. This is done by upsetting a iange, j), by means of the dies F and E,used in the operation of tapering the shell. A groove, o, having been run around the shell, and the anvil already in place, the die F is put over the shell, and passed back to the rear part, as shown in g. 4. The dieE, having a tapering bore, is then put over the front part ofthe shell, and forced down, the shoulder r striking the end of theshell before the dies close. This upsets the metal in the groove o, and forms the iangep at the same operation in which the shell is tapered. y

And now, havingdescribed my invention, what I claim as new, and desire to secure by Letters Patent, is-

Forming the ilange'p on the inside of the shell, by means of the dios E and F, at the same operation in which the shell is tapered, substantially as shown.

JAMES F. CRANSTON. Witnesses:

R. F. HYDE,

J'. B. GARDNER. 

